MOLLUSCA OF INDIA. 119 
columellari oblique descendente, subsinuato, leviter incrassato, superne 
refleaxiusculo. 
“Diam, major 24, minor 20, axis 11 mill. 
“ Hab. ad Darjiling.” 
“Distinguished by the proportion of the whorls and other characters 
from H. resplendens, Philippi, and from H. vitrinoides also by the 
greater depth of the last whorl, and the characters of the mouth. I 
have long possessed the pale-coloured variety from Darjiling ; the 
acquisition of a second dark-coloured specimen from Mr. Trotter has 
confirmed the distinctness of the species.” 
MAcrocHLAMYs KOLIAENSIS, n. sp. (Plate XXVI. figs. 5, 5a.) 
Locality. Koliaghur, on Brahmaputra river, Assam. (Young 
specimen.) 
Shell umbilicated, smooth, transparent, shining, very depressedly 
conoid; sculpture none; colour horny brown with an olive tinge; 
spire very low; suture adpressed ; whorls 5, rather rapidly increasing, 
last rounded on side and tumid below ; aperture subvertical, ovately 
lunate; peristome thin, oblique on columellar margin. 
Size: maj. diam. 12:0, min. 10-4; alt. axis 4-7, body-whorl 3-7 mm. 
Animal (extract from Field-book). “ Dusky green, side of foot 
grey, spotted with sienna; extremity of foot with gland, having an 
overhanging lobe long and pointed ; mantle just overlaps the edge of 
the aperture.” On dissection of dried specimen we find a long 
slender right shell-lobe on the upper inner margin, and a small left 
shell-lobe also could be made out. 
The generative organs are as in M acrochlamys indica, the amato- 
rial organ being present, having a blunt rounded termination at the 
anterior end. 
The central tooth of the radula of usual tricuspid form, the median 
have only the lower denticle on the outer basal margin ; the laterals 
are bicuspid cusps of unequal length even to those on the outer 
margin, which become very small. There were 93 rows of teeth 
arranged thus (vide Plate XXVIII. fig. 3):— 
AD SPN see a ca cee 
54.1. 54 
The jaw was straight on the cutting-edge, with a central median 
projection. 
el 
Sculpture regular, longitudinal coarse strie, broadly ridged 
(Plate XXI. fig. 7) ; odontophore with straight unicuspid laterals. 
Macrocn3amys casTaNnno-rapraTa, G.-A. (Plate XXIX. fig. 2.) 
Locality. Asalu, Burrail range, Assam. 
Shell perforate, depressedly conoid, flat below, surface shiny, with 
fine transverse lines of growth, translucent, moderately solid ; sculp- 
